Study on photovoltaic grid-connected inverter control system

The grid-connected photovoltaic generation system is the most important one in the field of photovoltaic application. In this paper, a model of photovoltaic has been constructed based on the main circuit of single phase grid-connected generation system using MATLAB/simulink to program it. The double closed loop control structure is adopted and forward-feed compensation method is employed to the system. It made the grid-connected current track the presetting sinusoidal reference signal in real time. The analytical and simulated results show that the grid-connected current waveform of the system is improved effectively and a faster dynamic response is obtained and forward-feed compensation control depress the grid disturbance.